Read The Fucking Manual. Used, more than most would imagine, in technical documents. Mostly of the manual or instructions variety. Tends to be added to the end or rather the start of the manual by technical writers annoyed by questions being brought up that are more than well answered in the relevant documentation.

Manuals on newly developed computer applications. R.T.F.M added to the end of the first introduction page.

Generally used on men who believe that they do not need to undertake any kind of instruction, that the act of being male itself, means they have the ablity to build/construct/erect anything without looking first, or even at all at the user manual, because men (believe) that these abilities are in their genes, and DO NOT require any help whatsoever from any kind instruction pamphlet! (Aww, bless them, they just never learn!)

"Sweetheart, really, you've been trying to put to put those shelves up for two weeks now...RTFM! Please! Before you bring the whole house down!"

To be used commonly by salespersons in electrical shops such as Comet. When a customer returns with the polystyrene still inserted inside the walkman and complains that it does not work! One can coin the phrase, "Dont worry sir, it's juts a case of RTFM".